CN101623754B - Preparation technology of nano-ceramic powder dispersing and strengthening cast alloy - Google Patents
Preparation technology of nano-ceramic powder dispersing and strengthening cast alloy Download PDFInfo
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- CN101623754B CN101623754B CN2009101443862A CN200910144386A CN101623754B CN 101623754 B CN101623754 B CN 101623754B CN 2009101443862 A CN2009101443862 A CN 2009101443862A CN 200910144386 A CN200910144386 A CN 200910144386A CN 101623754 B CN101623754 B CN 101623754B
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Abstract
The invention relates to a preparation technology of nano-ceramic powder dispersing and strengthening cast alloy, which is characterized by comprising the following steps: adding a fusing agent as an adhesive into nano-ceramic powder; mixing the powder into blocks or grains; adding the blocks or grains into a melting furnace, a hot metal ladle or a casting mould when a wearable cast is produced; and obtaining nano-ceramic powder dispersing and strengthening cast alloy or an iron-based composite material by a casting method. The technology can obtain a wearable material cast with evenly distributed nano-ceramic grains, obtains heterogeneous nucleation by adding the nano-ceramic grains, refines crystal grains and increases the wearing resistance of materials; and the nano-ceramic powder dispersing and strengthening cast alloy has simple production technology and no need special devices and can be produced by a common cast factory.
Description
Technical field
The invention belongs to nano ceramics dispersing and strengthening cast alloy and iron base composite material preparation field.
Background technology
The widely used consumable accessorys in field such as electric power, metallurgy, mine, building materials adopt the common metal high-abrasive material usually, and the conventional cast high-abrasive material is owing to be subjected to the restriction of chemical composition, the hardness of hard phase compound is not only on the low side, and its volume fraction is also on the low side, has influenced the wearability of material.In order to improve the service life of casting wear-resistant material, people study various composite-material abrasive parts, and dispersing and strengthening cast alloy is exactly wherein a kind of.But if adopt the dispersion-strengtherning of strong carbide forming element, the addition of metallic element is limited, and the wearability increase rate is not obvious; If directly adding can disperse be distributed in the cermet powder in the molten metal, then can improve the ceramic powder volume fraction, and then raising material wear ability, but because moistening problem cermet powder differs surely evenly, disperse is distributed in the liquid metal, can float in the slag mostly, not have the effect of dispersion-strengtherning.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of preparation technology of nano-ceramic powder dispersing and strengthening cast alloy is provided, high-abrasive material foundry goods in the hope of the nano-ceramic particle that evenly distributed, adding by nano-ceramic particle obtains heterogeneous forming core, crystal grain thinning, the wearability of raising material.
Technical solution problem of the present invention adopts following technical scheme:
Nano-ceramic powder dispersing and strengthening cast alloy preparation technology's of the present invention characteristics are that adding can be as the flux of binding agent in nano-ceramic powder, be mixed and made into block or granular, when producing wear resistance castings, join in smelting furnace, ladle or the casting mold, obtain nano ceramics dispersing and strengthening cast alloy or iron base composite material by the method for casting.
Nano-ceramic powder dispersing and strengthening cast alloy preparation technology of the present invention operates as follows:
A, Nano titanium nitride or titanium carbide: borax: sodium carbonate: water is 100: 1: 0.5 by weight: 7～10 take by weighing raw material, borax and sodium carbonate added in the entry heat while stirring, until hot water dissolve fully the aqueous solution of borax and sodium carbonate, the aqueous solution of described borax and sodium carbonate is mixed with Nano titanium nitride or titanium carbide and stir, make block or granular blank with mould, described bulk or granular blank promptly get the nano-ceramic powder compound through 200 ℃ of oven dry;
B, employing casting production process are added in described nano-ceramic powder compound in the smelting furnace that is about to come out of the stove by 0.2%～0.4% of molten iron or molten steel weight, or add in the casting ladle before coming out of the stove, and finish casting and promptly get nano-ceramic powder dispersing and strengthening cast alloy;
Or, described nano-ceramic powder compound is placed on the down gate bottom for the medium-and-large-sized foundry goods of weight above 100 kilograms, during cast, the nano-ceramic powder compound promptly gets nano-ceramic powder dispersing and strengthening cast alloy along with molten metal enters casting mold after solidifying.
Compared with the prior art, the present invention produces effect and is embodied in:
1, the present invention mixes with the high hardness nanocomposite ceramic powder with as an amount of flux of binding agent, make bulk, add in smelting furnace, ladle or the die cavity, pass through casting, the high-abrasive material foundry goods of nano-ceramic particle is evenly distributed, can regulate its volume fraction by the addition of adjusting nano ceramics, under the prerequisite that guarantees material impact toughness, the nano ceramics volume fraction is big more, material wear ability is high more, in addition because the adding of nano-ceramic particle can obtain heterogeneous forming core, refinement carbide grain, the also corresponding wearability that improves material.
2, the present invention greatly reduces the preparation cost of such material, and production technology is simple, need not special installation, and conventional cast factory can produce.
The specific embodiment
In concrete the enforcement, the preparation of nano-ceramic powder dispersing and strengthening cast alloy is carried out as follows:
1, selects nano-ceramic powder according to structure, use occasion and the working condition factor of wear resistance castings.
2, mix and make nano-ceramic powder and a certain amount of flux block or granular.
3, can select to add in the stove, wrap interior the adding according to factors such as wear resistance castings service condition, physical dimensions, or the method that adds in the type.
4, pouring cast part.
5, promptly get the nano ceramics dispersing and strengthening cast alloy after the foundry goods cooling, also can be described as iron base composite material.
Embodiment 1:
Add the nano-ceramic powder compound in rich chromium cast iron KmTBCr26 bar, poured weights is 280 kilograms.
The weight proportion of nano-ceramic powder compound is: Nano titanium nitride 100g, borax 1g, sodium carbonate 0.5g.
The preparation of nano-ceramic powder compound: load weighted borax and sodium carbonate are put into 7～10ml water, heat while stirring, until borax and sodium carbonate dissolve fully solution, borax and sodium carbonate solubility in normal-temperature water is low, can dissolve fully when heating 60 to 80 ℃ to obtain solution; Solution and Nano titanium nitride are mixed, make bulk in die for molding and be placed in the baking oven and dry, bake out temperature is 200 ℃, drying time 30 minutes, the nano-ceramic powder compound.
The addition of nano-ceramic powder compound is: addition is 0.2% of a weight of molten iron.
Adding method: adopt and to pour method, the nano-ceramic powder mixture block is placed ladle before promptly going out molten iron.
The cast sample, by the metallography microscope sem observation, its primary carbide yardstick reduces about 50%, and wearability obviously improves.
Embodiment 2:
Add the nano-ceramic powder compound in potassium steel ZGMn13, product is a grinder hammerhead, and poured weights is 80kg.
The weight proportion of nano-ceramic powder compound is: Nano titanium nitride 100g, borax 1g, sodium carbonate 0.5g.
The preparation of nano-ceramic powder compound: load weighted borax and sodium carbonate are put into 10ml water, heating edge stirs, dissolve fully until borax and sodium carbonate, solution and Nano titanium nitride are mixed, making bulk in die for molding is placed in the baking oven and dries, bake out temperature is 200 ℃, drying time 30 minutes.
The addition of nano-ceramic powder compound is: addition is 0.3% of a molten steel weight.
Adding method: adopt and to pour method, the nano-ceramic powder mixture block is placed ladle before promptly going out molten iron.
The cast sample, by the metallography microscope sem observation, a large amount of ceramic particles evenly distribute in austenite.Material wear ability is significantly improved.
Claims (1)
1. the preparation technology of nano-ceramic powder dispersing and strengthening cast alloy, described preparation technology is that adding can be as the flux of binding agent in nano-ceramic powder, be mixed and made into block or granular, when producing wear resistance castings, join in smelting furnace, ladle or the casting mold, obtain nano ceramics dispersing and strengthening cast alloy or iron base composite material by the method for casting; It is characterized in that operating as follows:
A, Nano titanium nitride or titanium carbide: borax: sodium carbonate: water is 100: 1: 0.5 by weight: 7～10 take by weighing raw material, borax and sodium carbonate added in the entry heat while stirring, until hot water dissolve fully the aqueous solution of borax and sodium carbonate, the aqueous solution of described borax and sodium carbonate is mixed with Nano titanium nitride or titanium carbide and stir, make block or granular blank with mould, described bulk or granular blank promptly get the nano-ceramic powder compound through 200 ℃ of oven dry;
B, employing casting production process are added in described nano-ceramic powder compound in the smelting furnace that is about to come out of the stove by 0.2%～0.4% of molten iron or molten steel weight, or add in the casting ladle before coming out of the stove, and finish casting and promptly get nano-ceramic powder dispersing and strengthening cast alloy;
Or, described nano-ceramic powder compound is placed on the down gate bottom for the medium-and-large-sized foundry goods of weight above 100 kilograms, during cast, the nano-ceramic powder compound promptly gets nano-ceramic powder dispersing and strengthening cast alloy along with molten metal enters casting mold after solidifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101443862A CN101623754B (en) | 2009-08-06 | 2009-08-06 | Preparation technology of nano-ceramic powder dispersing and strengthening cast alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101443862A CN101623754B (en) | 2009-08-06 | 2009-08-06 | Preparation technology of nano-ceramic powder dispersing and strengthening cast alloy |
Publications (2)
| Publication Number | Publication Date |
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| CN101623754A CN101623754A (en) | 2010-01-13 |
| CN101623754B true CN101623754B (en) | 2011-02-02 |
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| CN2009101443862A Expired - Fee Related CN101623754B (en) | 2009-08-06 | 2009-08-06 | Preparation technology of nano-ceramic powder dispersing and strengthening cast alloy |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031443A (en) * | 2010-11-12 | 2011-04-27 | 合肥开尔纳米能源科技股份有限公司 | Method for improving performance of alloy steel by using nano ceramic powder and special equipment thereof |
| CN105090513A (en) * | 2015-08-12 | 2015-11-25 | 李纯 | Ceramic dispersion strengthening metal abrasion resisting belt and metal stamping ring floating oil seal |
| CN105108110B (en) * | 2015-09-07 | 2018-05-01 | 北京金煤创业进出口有限公司 | The high chromium composite strengthening cast steel wear rib/plate casting technique of ceramics |
| CN106747545B (en) * | 2016-12-16 | 2017-10-31 | 东北大学 | A kind of dispersion-strengtherning ceramic composite and preparation method thereof |
| CN108823363A (en) * | 2018-08-06 | 2018-11-16 | 合肥岑遥新材料科技有限公司 | A kind of tubing preparation method of automobile buffer beam metal matrix ceramic composites |
| CN112122588B (en) * | 2020-09-11 | 2021-10-29 | 马鞍山市三川机械制造有限公司 | Method for improving mechanical property of automobile covering part |
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Granted publication date: 20110202 Termination date: 20170806 |